A genius biologist, Dr.
Gangjae Lee is a happy husband who has been married for 7 years to Jaehee, a
woman whose astonishing beauty captivates men. While living a double life as a
college research professor, Dr. Lee secretly participates in a human cloning
project run by Dr. Suh.

Through numerous trials and errors, and thousands of
experiments, a few clones are born. But these miracles of science are
sub-quality clones whose life spans don't stretch much past 7 years. Although
their methods improve, the two doctors give birth to another sub-quality clone,
but this one is of Dr. Lee's wife, Jaehee. They call her by three different
names: Jaehee, Clone S04, and a name her lover and popular novelist Jinhun gives
her, June.

Together with Dr. Suh and Jungwoo,
and hidden from the eyes of the world, Dr. Lee devotes himself to this project.
But one day, his wife who he treasures more than his own life, gets brutally
murdered and the story takes a different turn...